Infineon Technologies TLE4279GMXUMA2

Overview

TLE4279GMXUMA2 from Infineon is an AEC-Q100-qualified automotive linear voltage regulator delivering a precise 5 V ±2% output with 150 mA load capability, 0.25 V dropout at 100 mA, and integrated reset generation triggered at VQ < 4.65 V. It operates from 6–45 V input, features reverse-polarity protection, overtemperature shutdown at 150°C, and supports early warning via sense input for battery monitoring in engine control units.

For engineers reviewing the TLE4279GMXUMA2 datasheet, TLE4279GMXUMA2 pinout, TLE4279GMXUMA2 application, or TLE4279GMXUMA2 equivalent, key selection criteria include its adjustable reset threshold (1.26–1.44 V reference), programmable reset delay (17–28 ms with 100 nF), open-collector reset/sense outputs, and PG-DSO-14 package compatibility with high-reliability automotive power domains.

Technical Context

The TLE4279GMXUMA2 implements a bandgap-referenced error amplifier driving a PNP pass transistor to regulate output voltage. Its internal reset generator compares VQ against a trimmed 4.65 V threshold and provides an open-collector low-active signal with externally adjustable delay via capacitor on the D pin.

It integrates dual comparators: one monitors VQ for reset, another senses input voltage via SI pin using 1.20–1.31 V thresholds to generate early warning on SO. All logic outputs are open-collector, requiring external pull-ups, and thermal protection disables the pass element above 150°C junction temperature.

Key Specifications

Pinout & Package

Package: PG-DSO-14 (exposed pad, RoHS-compliant, moisture sensitivity level 3).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive linear regulator applications.

Compared with TLV73350PDBVR and TLE42754G, the TLE4279GMXUMA2 uniquely combines adjustable reset threshold, programmable delay, and dual-voltage monitoring (VQ + SI) in a single AEC-Q100-qualified device-making it optimal for ECU/BCM designs requiring coordinated brownout response and battery health awareness.

Availability

TLE4279GMXUMA2 is available at Aetrix Electronics and suitable for engine control units, body control modules, transmission control units, and ADAS camera power supplies requiring stable component supply, long-term automotive lifecycle support, and RoHS-compliant manufacturing.

Supply support for TLE4279GMXUMA2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and security solutions, with global R&D and wafer fabrication facilities.

The OPTIREG™Linear product line delivers robust, AEC-Q100-qualified linear regulators designed specifically for automotive power domains-emphasizing fault resilience, wide input range, and integrated supervision features for E/E architecture simplification.

FAQ

What is the minimum input voltage required to maintain 5 V regulation?

The TLE4279GMXUMA2 maintains regulation down to an input voltage of 5.25 V at 100 mA load, based on its 0.25 V typical dropout voltage. Below this, output voltage drops linearly with input. Operation is guaranteed from VI = 6 V to 45 V per datasheet specifications, with absolute maximum rating extending to −40 V for reverse polarity events.

How do I configure the reset delay time?

Connect a capacitor between Pin 2 (D) and GND. With a 100 nF capacitor, delay is 17–28 ms; larger values increase delay linearly. The internal charge current is 3.0–9.5 µA, so td ≈ 0.7 × CD × 1 V / ID. Avoid capacitors > 1 µF to prevent excessive startup time and ensure reliable reset assertion during fast transients.

Can the sense input (SI) be used to monitor a 12 V battery directly?

No-SI accepts only 0–7 V per absolute maximum ratings. To monitor 12 V, use a resistor divider (e.g., 100 kΩ + 47 kΩ) to scale 12 V down to ~3.83 V, then further attenuate to 1.20–1.31 V range using a second divider or precision reference. The SI comparator triggers SO low when divided voltage falls below 1.20 V, indicating battery sag.

Is the exposed pad on the PG-DSO-14 package electrically connected?

Yes-the exposed thermal pad (EP) is internally connected to GND and must be soldered to a large PCB copper area for thermal conduction and EMI reduction. Do not leave it floating or connect it to any other net. Thermal resistance drops from 70 K/W (junction-to-ambient) to ≤30 K/W when EP is properly thermally anchored per Infineon layout guidelines.